Configuration:
Multidomain server with SQL user source.

LoginFieldNames = ( mail ) is set for users to be able login with email address, like 'user.name@example.com'
The table viewURL field c_uid has username without domain, like 'user.name'
This configuration works great. User can use email as username for login and SOGo correctly appends domain to username to manage ACL.

However when the paramter SOGoPasswordChangeEnabled is set to YES and user tries to change password, SQL filters by c_uid with LoginFieldNames parameter and password is not changed, like:

UPDATE sogo_abcsolutions_lv SET c_password = 'XXXXXXXXXX' WHERE c_uid = 'user.name@example.com';